Omega Pacific 1/2" Steel Modified D NFPA Screw-Lok
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Here's what other sites are saying:
Designed for rescue work, this 1/2-in. modified-D steel carabiner has a strength rating of 65kN (that's over 14,000 pound-force units).
Trust your weight to the heat-treated, 1/2-inch alloy-steel strength of Omega Pacific's Modified 1/2-inch Steel Screw-Lok D carabiner that exceeds NFPA strength requirements. Handle ropes easily - the D shape, ample gate opening, and screw lock keep operation streamlined.
- Mountain Gear
Same "D" shape as the 7/16" model, but with bigger material for increased strength. Same great handling and use characteristics but with a strength rating of 65 kN (that's over 14,000 lbs.!).
- Altrec Outdoors
Steel carbiners are for use in applications where high strength and durability are of primary importance and weight is a secondary consideration. Full size offset D locking carabiners are ideal for rescue amd industrial applications, as well as schools and ropes courses. Tempered steel carabiner utilizes a gate lock design which eliminates the danger of the locking mechanism being over-tightened, causing it to bind. Gate lock carabiners are preferred in rescue applications where the carabiners are continually checked for security.